Hot-dip galvanized steel coil GI, zero spangle, construction roofing
Hot-Dip Galvanized / Galvalume Steel Coil (GI/GL) – Corrosion Resistant Steel Sheets for Construction & Industrial Use - Image 2
Hot-Dip Galvanized / Galvalume Steel Coil (GI/GL) – Corrosion Resistant Steel Sheets for Construction & Industrial Use - Image 3
Hot-Dip Galvanized / Galvalume Steel Coil (GI/GL) – Corrosion Resistant Steel Sheets for Construction & Industrial Use - Image 4
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Hot-Dip Galvanized / Galvalume Steel Coil (GI/GL) – Corrosion Resistant Steel Sheets for Construction & Industrial Use

hot dip galvanized steel coil

  • Superior Corrosion Resistance: The zinc/aluminum-zinc coating acts as a barrier against moisture and oxidation. GL coils offer 2–4 times longer service life than GI coils in the same environment.
  • Excellent Formability & Weldability: Suitable for bending, stamping, deep drawing, and welding without coating peeling or damage.
  • High Heat & UV Resistance: GL coils withstand temperatures up to 315°C, making them ideal for high-heat applications like roofing and exhaust systems.
  • Cost-Effective Long-Term Solution: Lower maintenance and replacement costs compared to bare steel or stainless steel, reducing total project lifecycle expenses.
  • Full Customization Support: Tailored thickness, width, coating weight, and surface treatment to meet unique project requirements. OEM/ODM services available.
  • Reliable Quality Control: Strict salt spray, coating weight, and tensile strength tests ensure compliance with international standards for consistent performance.
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We supply high-quality galvalume steel coils (GL) from certified Chinese manufacturers, complying with GB/T 14978-2008, ASTM A792, EN 10346, and JIS G3321 standards.
Key Specifications:
  • Thickness: 0.12 mm – 2.0 mm (tolerance ±0.001 mm)
  • Width: 600 mm – 1500 mm (common sizes: 914/1000/1200/1219 mm)
  • Coating: 55% Al-Zn alloy coating, AZ30–150 g/m²
  • Steel grades: DX51D, DX52D, G250–G550
  • Core diameter: 508 mm or 610 mm
Core Performance:
  • Excellent toughness, bending resistance, and weldability
  • Superior coating adhesion for deep drawing, stamping, and cutting without peeling
  • High temperature resistance (up to 315℃) and UV resistance for long-term outdoor use
  • 2–6 times higher corrosion resistance than standard galvanized steel, ideal for coastal/humid environments
GL coils are widely used in roofing sheets, wall panels, steel structures, household appliances, automotive parts, and agricultural facilities, serving as a cost-effective solution for outdoor and high-humidity projects.
We provide OEM/ODM customization for size, coating, and packaging to meet your project needs. Third-party inspections (SGS, BV) are available for bidding support. If you are interested in related building materials, please check our [steel sheets] series.
Standard seaworthy packaging (waterproof paper + metal pallet) ensures safe transport.
(For further information regarding the parameters, please do not hesitate to contact us.)

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